Key Features
• Industry standard Quarter-brick
57.9 x 36.8 x 8.5 mm
(2.28 x 1.45 x 0.33 in)
• Low profi le, max 8.5 mm (0.33 in), and
cost effi cient open frame design
• Designed according to the EU RoHS
directive (Restriction of Hazardous
Substances).
• High effi ciency, typ. 90 % at 3.3 Vout
half load
• 1500 VDC input to output isolation,
designed to meet isolation requirements
equivalent to Basic Insulation according
to IEC/EN/UL 60950
• More than 7.0 million hours predicted
MTBF at 40° C ambient.
DC/DC converters
Input 36-75 Vdc
Output up to 20A/50W
PKM 4000E PI
E
The PKM 4000E series of high efficiency DC/DC
converters are designed to provide high quality on-board
power solutions in distributed power architectures used
in Internetworking equipment in wireless and wired
communications applications.
The PKM 4000E series has industry standard quarter
brick footprint and pin-out and is only 8.5 mm (0.33
in) high. This makes it extremely well suited for narrow
board pitch applications with board spacing down to
15 mm (0.6 in). The PKM 4000E series uses patented
synchronous rectification technology and achieves an
efficiency up to 89% at full load. Ericsson's PKM 4000E
series addresses both the industrial and the emerging
telecom market for applications in the multi-service
network by specifying the input voltage range in
accordance with ETSI specifications.
Included as standard features are output over-voltage
protection, input under-voltage protection, over
temperature protection, soft-start, output short circuit
protection, remote sense, remote control, and output
voltage adjust function.
These converters are designed to meet high reliability
requirements and are manufactured in highly
automated manufacturing lines and meet world-class
quality levels. Ericsson Power Modules is an
ISO 9001/14001 certified supplier.
Datasheet
2PKM 4000E PI Datasheet EN/LZT 146 051 R1A ©Ericsson Power Modules, February 2004
Characteristics Conditions min typ max Unit
VIInput voltage range 36 75 Vdc
VIoff Turn-off input voltage Ramping from higher
voltage 30 Vdc
VIon Turn-on input voltage Ramping from lower
voltage 33.5 Vdc
CIInput capacitance 1µF
PII Input idling power Io= 0, VI = 53 V 2 W
PRC Input standby power
(turned off with RC) VI = 53 V, RC activated 0.25 W
Characteristics min max Unit
Tref Maximum Operating Tref Temperature -40 +110 ˚C
TSStorage temperature -55 +125 ˚C
VIInput voltage -0.5 +80 Vdc
VISO Isolation voltage (input to output test voltage) 1500 Vdc
Vtr Input voltage transient (TP100 ms) 100 Vdc
VRC Negative logic (referenced to - In) 75 Vdc
VRC Positive logic (referenced to - In) 6 Vdc
Vadj Maximum input -0.5 2xVoi Vdc
Input Tref <Tref max see thermal consideration for temperature reference points
Note:
Stress in excess of Absolute Maximum Ratings may cause permanent damage. Absolute Maximum Ratings, sometimes referred to as
no destruction limits, are normally tested with one parameter at a time exceeding the limits of Output data or Electrical Characteristics. If
exposed to stress above these limits, function and performance may degrade in an unspecifi ed manner.
Absolute Maximum Ratings
Characteristics
Random Vibration IEC 68-2-34Ed
Frequency
Spectral density
Duration
10 ... 500 Hz
0.07 g2/Hz
10 min each direction
Sinusoidal
Vibration IEC 68-2-6 Fc
Frequency
Amplitude
Acceleration
Number of cycles
10 ... 500 Hz
0.75 mm
10 g
10 in each axis
Shock
(half sinus) IEC 68-2-27 Ea
Peak acceleration
Duration
100 g
6 ms
Temperature
change IEC 68-2-14 Na
Temperature
Number of cycles
-40 ... +100 ˚C
300
Heat/Humidity IEC 68-2-3 Ca
Temperature
Humidity
Duration
+85 ˚C
85 % RH
1000 hours
Solder heat
stability IEC 68-2-20 1A Temperature, solder
Duration
260 ˚C
10 ...13 s
Resistance to
cleaning solvents
IEC 68-2-45 XA
Method 2
Water
Isopropyl alcohol
Glycol ether
+55 ±5 ˚C
+35 ±5 ˚C
+35 ±5 ˚C
Cold (in operation) IEC 68-2-1 AdTemperature
Duration
-45 ˚C
2 h
Storage test IEC 68-2-2 BaTemperature
Duration
+125 ˚C
1000 h
Environmental Characteristics
Safety
The PKM 4000 E series DC/DC
converters are designed in accordance
with safety standards IEC/EN/UL 60
950, Safety of Information Technology
Equipment. The PKM 4000 E series DC/
DC converters are UL 60 950 recognized
and certifi ed in accordance with EN 60
950 (pending).
The DC/DC converter should be installed
in the end-use equipment, in accordance
with the requirements of the ultimate
application. The input source must be
isolated by minimum Basic insulation
from the primary circuit in accordance
with IEC/EN/UL 60 950. If the input
voltage to the DC/DC converter is 75 V
dc or less, then the output remains SELV
(Safety Extra Low Voltage) under normal
and abnormal operating conditions.
Single fault testing in the input power
supply circuit should be performed
with the DC/DC converter connected to
demonstrate that the input voltage does
not exceed 75 V dc. If the input power
source circuit is a DC power system,
the source may be treated as a TNV2
circuit and testing has demonstrated
compliance with SELV limits and
isolation requirements equivalent to Basic
insulation in accordance with
IEC/EN/UL 60 950.
It is recommended that a slow blow fuse
with a rating of 5A be used at the input
of each DC/DC converter. The PKM-E
series DC/DC converters are approved for
a maximum fuse rating of 15A. If a fault
occurs in the converter that imposes a
short circuit on the input source, this fuse
will provide the following functions:
• Isolate the faulty DC/DC converter
from the input power source not to
affect the operation of other parts of
the system.
• Protect the distribution wiring from
excessive current and power loss thus
preventing hazardous overheating.
The galvanic isolation is verifi ed in an
electric strength test. The test voltage
(VISO) between input and output is 1500
Vdc for 60 seconds. Leakage current is less
than 1uA at nominal input voltage.
The fl ammability rating for all
construction parts of the DC/DC
converter meets UL 94V-0.
3
PKM 4000E PI Datasheet EN/LZT 146 051 R1A ©Ericsson Power Modules, February 2004
Connections
Fundamental Circuit Diagram
Weight
PKM 4510E PI 20 g
Pins
Material: Brass Alloy (pin 1-3,5-7) Brass C 97 (pin 4,8)
Plating: 0.1 µm Gold over Nickel
Mechanical Data
For more information about the functions see Operating Information
57.90 [2.28]
54.34 [2.14]
3.56 [0.14]
14.59 [0.57]
22.21 [0.87]
10.78 [0.42]
18.40 [0.72]
26.02 [1.02]
36.8 [1.45]
Comp.
1.80 [0.07]
6.70 [0.26]
X
X = 3.60 [0.14] or 5.30 [0.21] depending of choice of pinlength
2.70 [0.11]
1.52 [0.06]
1.83 [0.07]
1.02 [0.04]
57.90 [2.28]
54.34 [2.14]
52.60 [2.07]
5.33 [0.21]
3.56 [0.14]
14.59 [0.57]
22.21 [0.87]
31.48 [1.24]
5.33 [0.21]
10.78 [0.42]
18.40 [0.72]
26.02 [1.02]
36.8 [1.45]
1
2
3
4
8
7
6
5
Mounting holes
Ø3.20 [.12] (2x)
The distance between the "highest" component in
the DC/DC converter and the PCB is 1.0 mm [.039]
Component side
Recommended footprint (Component side)
Ø1.42 [.056] (6x)
Ø1.92 [.076] (2x)
3
2
1
Primary Secondary
Control
Isolated
Feedback
8
4
5
7
6
Choke
Resistor
Capacitor
Control
Pin Designation Function
1 - In Negative input
2RC Remote control. For turn-on and
turn-off.
3 + In Positive input
4 - Out Negative output
5 - Sen Negative remote sense
6V
adj Output voltage adjust
7 + Sen Positive remote sense
8 + Out Positive output
4PKM 4000E PI Datasheet EN/LZT 146 051 R1A ©Ericsson Power Modules, February 2004
Characteristics Conditions
Output Unit
min typ max
VOi
Output voltage initial setting
and accuracy IOmax, VI = 53 V, TPcb = 25 ˚C 3.23 3.3 3.37 V
Output adjust range IOmax, VI = 53 V, TPcb = 25 ˚C 2.97 3.63 V
VO
Output voltage tolerance band IO = (0.1...1.0) x IOmax 3.2 3.4 V
Idling voltage IO = 0 3.2 3.4 V
Line regulation IOmax 5mV
Load regulation IO = (0.01...1.0) × IOmax, VI = 53 V 5 mV
Vtr
Load transient
voltage deviation
IO = (0.1...1.0) × IOmax, VI = 53 V,
load step = 0.5 × IOmax ±250 mV
ttr Load transient recovery time IO = (0.1...1.0) × IOmax, VI = 53 V,
load step = 0.5 × IOmax 100 µs
trRamp-up time IO = (0.1...1.0) × IOmax, VI = 53 V
(0.1...0.9) × VOnom 510ms
tsStart-up time IO = (0.1...1.0) × IOmax, VI = 53 V
VI connection to 0.9 x VOnom 7.5 15 ms
IOOutput current 0 15 A
POmax Max output power At VO = VOnom 50 W
Ilim Current limit threshold TPcb < TPcbmax 20 A
Isc Short circuit current TPcb = 25 °C, VO < 0.5V 25 A
VOac Output ripple & noise See ripple and noise, IOmax, VOnom, 25 50 mVp-p
SVR Supply voltage rejection (ac) TPcb = 25 °C, f = 100 Hz sinewave , 1 Vpp,
VI = 53 V 70 dB
OVP Over voltage protection VI = 53 V IO = (0.1...1.0) × IOmax 3.9 5.0 V
TPcb = -40...+90 ºC and VI = 36…75V, sense pins connected to output pins unless otherwise specifi ed.
PKM 4510E PI Output
Miscellaneous
Characteristics Conditions min typ max Unit
ηEffi ciency - 50% load TPcb = +25 °C, VI = 48 V, IO = 0.5 x IOmax 90.5 %
ηEffi ciency - 100% load TPcb = +25 °C, VI = 48 V, IO = IOmax 89 %
ηEffi ciency - 50% load TPcb = +25 °C, VI = 53 V, IO = 0.5 x IOmax 90 %
ηEffi ciency - 100% load TPcb = +25 °C, VI = 53 V, IO = IOmax 87 89 %
PdPower Dissipation IOmax, VI = 53 V, TPcb = 25 ˚C 6 W
fsSwitching frequency 180 kHz
5
PKM 4000E PI Datasheet EN/LZT 146 051 R1A ©Ericsson Power Modules, February 2004
Effi ciency Output Current Derating
PKM 4510E PI Typical Characteristics
Available load current vs. ambient air temperature and air-
fl ow at Vin=53 V. DC/DC converter mounted vertically with
airfl ow blowing from output pins toward input pins.
Effi ciency vs. load current and input voltage at TPcb=+25 °C
051015
20
70
75
80
85
90
95
36 V
48 V
53 V
75 V
020
40 60 80 100
0
5
10
15
[°C]
[A]
2.0 m/s (400 lfm)
1.5 m/s (300 lfm)
1.0 m/s (200 lfm)
Nat. Conv.
3.0 m/s (600 lfm)
2.5 m/s (500 lfm)
Output Characteristic
Output voltage vs. load current at TPcb=+25 °C, Vin=53 V.
0369
12 15
3.20
3.25
3.30
3.35
3.40
[A]
[V]
Power Dissipation
0 3 6 9 12 15
0
1
2
3
4
5
6
7
8
[A]
[W]
36 V
48 V
53 V
75 V
Dissipated power vs. load current and input voltage at
TPcb=+25 °C
Thermal resistance
0.0 0.5 1.0 1.5 2.0 2.5 3.0
0
2
4
6
8
10
[m/s]
[°C/W]
Thermal resistance vs. airspeed measured at the converter. Tested in
windtunnel with a cross section of 305×305 mm mounted on a 8
layers PCB with 254x254mm size. Each layer with 35 µm (1oz) copper.
6PKM 4000E PI Datasheet EN/LZT 146 051 R1A ©Ericsson Power Modules, February 2004
PKM 4510E PI Typical Characteristics
Output Ripple Transient
Output voltage ripple (50mV/div.) at TPcb=+25 °C, Vin=53 V,
Io=15A resistive load with C=10 µF tantalum and 0.1 µF
ceramic capacitors. Band width=20MHz. Time scale: 2µs / div.
Output voltage response to load current step-change
(3.75-11.25-3.75 A) at TPcb=+25 °C, Vin=53 V. Top
trace: output voltage (200mV/div.). Bottom trace:
load current (5 A/div.) Time scale: 0.1 ms/div.
Output Voltage Adjust
Output voltage adjust resistor value vs.
percentage change in output voltage.
1
10
100
1000
10000
100000
024 681012
Decrease
Increase
[kOhm]
[%]
Output Voltage Adjust
The resistor value for an adjusted output voltage is
calculated by using the following equations:
Output Voltage Adjust Upwards, Increase:
Radj= 5.11 [3.3(100+∆%) / 1.225∆%- (100+2∆%) /∆% ] kΩ
Output Voltage Adjust Downwards, Decrease:
Radj= 5.11 [(100 / ∆%-2) ] kΩ
Eg Increase 4% =>Vout = 3.43 Vdc
5.11 [3.3(100+4)/(1.225x4)-(100+2x4)/4=219.9 kOhm
Eg Decrease 2% =>Vout = 3.23 Vdc
5.11 x(100/2-2)=245.3 kOhm
Start-Up Turn-Off
Start-up at Io=15A resistive load at TPcb=+25 °C,
Vin=53 V. Start enabled by connecting Vin. Top trace:
input voltage (10 V/div.). Bottom trace: output voltage
(1 V/div.). Time scale: 5 ms/div.
Turn-off at Io=15A resistive load at TPcb=+25 °C,
Vin=53 V. Turn-off enabled by disconnecting Vin. Top
trace: output voltage (1 V/div.). Bottom trace: input
voltage (20 V/div.). Time scale: 10 ms/div.
7
PKM 4000E PI Datasheet EN/LZT 146 051 R1A ©Ericsson Power Modules, February 2004
EMC Specifi cation
The conducted EMI measurement was performed using a
module placed directly on the test bench.
The fundamental switching frequency is 180kHz for PKM
4510E PI @ VI = 53V, IO = (0.1...1.0) × IOmax.
Test set-up.
PKM 4510E PI with fi lter.
DC
Power
Source
+
-
5µH 50Ω
5µH 50Ω
LISN
LISN
in
in out
out
rcvr
rcvr
50 ohm input
1 m Twisted Pair
50 ohm temination
Optional Connection
to Earth Ground
Filter
(if used)
Power Module
Resistive
Load
Printed Circuit Board
EMC
Reciver Computer
PKM 4510E PI without fi lter.
Layout Recommendation
The radiated EMI performance of the DC/DC converter will be
optimised by including a ground plane in the PCB area under
the DC/DC converter. This approach will return switching
noise to ground as directly as possible, with improvements to
both emissions and susceptibility. If one ground trace is used,
it should be connected to the input return. Alternatively, two
ground traces may be used, with the trace under the input side
of the DC/DC converter connected to the input return and the
trace under the output side of the DC/DC converter connected
to the output return. Make sure to use appropriate safety
isolation spacing between these two return traces. The use of
two traces as described will provide the capability of routing
the input noise and output noise back to their respective
returns.
External fi lter (class B)
Required external input fi lter in order to meet class B in
EN 55022, CISPR 22 and FCC part 15J.
The used capacitors are of ceramic type.
Conducted EMI Input terminal value (typ)
0.68uF 0.68uF
3.9nF
768uH
PO422(Pulse)
0.68uF
3.9nF
15uH
47uF +
+
-
DC/DC
BNC
Connector
to Scope
Ceramic
Capacitor
+Vout
+Sense
Trim
-Sense
-Vout
Load
Tantalum
Capacitor
* Conductor from Vout to capacitors = 50mm [1.97in]
+
0.1uF 10uF
Output ripple and noise test setup
Output ripple and noise
The circuit below has been used for the ripple and noise
measurements on the PKM 4000E Series DC/DC converters.
8PKM 4000E PI Datasheet EN/LZT 146 051 R1A ©Ericsson Power Modules, February 2004
Operating Information
Input Voltage
The input voltage range 36…75Vdc meets the requirements
of the European Telecom Standard ETS 300 132-2 for normal
input voltage range in –48V and –60V DC systems, -40.5…-
57.0V and –50.0…-72V respectively. At input voltages
exceeding 75V, the power loss will be higher than at normal
input voltage and Tref must be limited to absolute max
+110°C. The absolute maximum continuous input voltage
is 80Vdc.
Turn-Off Input Voltage
The PKM 4000E Series DC/DC converters monitor the input
voltage and will turn on and turn off at predetermined levels.
The minimum hysteresis between turn on and turn off input
voltage is 2V where the turn on input voltage is the highest.
Output Voltage Adjust (Vadj)
All PKM 4000E Series DC/DC converters have an Output
Voltage adjust pin (Vadj). This pin can be used to adjust the
output voltage above or below Output voltage initial setting.
When increasing the output voltage, the voltage at the output
pins (including any remote sense offset) must be kept below
the overvoltage trip point, to prevent the converter from
shut down. Also note that at increased output voltages the
maximum power rating of the converter remains the same, and
the output current capability will decrease correspondingly. To
decrease the output voltage the resistor should be connected
between Vadj pin and –Sense pin. To increase the voltage the
resistor should be connected between Vadj pin and +Sense
pin. The resistor value of the Output voltage adjust function is
according to information given under the output section.
Remote Control (RC)
The PKM 4000E Series DC/DC
converters have a remote control
function referenced to the primary side
(- In), with negative and positive logic
options available. The RC function
allows the converter to be turned
on/off by an external device like a
semiconductor or mechanical switch.
The RC pin has an internal pull up resistor to + In. The needed
maximum sink current is 1mA. When the RC pin is left
open, the voltage generated on the RC pin is 3.5-6.0V. The
maximum allowable leakage current of the switch is 50µA.
The standard converter is provided with “negative logic”
remote control and the converter will be off until the RC pin
is connected to the - In. To turn on the converter the voltage
between RC pin and - In should be less than 1V. To turn off
the converter the RC pin should be left open, or connected to a
voltage higher than 4V referenced to - In. In situations where
it is desired to have the converter to power up automatically
without the need for control signals or a switch, the RC pin
can be wired directly to - In.
The second option is “positive logic” remote control, which
can be ordered by adding the suffi x “P” to the end of the part
number. The converter will turn on when the input voltage
is applied with the RC pin open. Turn off is achieved by
connecting the RC pin to the - In. To ensure safe turn off the
voltage difference between RC pin and the - In pin shall be less
than 1V. The converter will restart automatically when this
connection is opened.
All PKM 4000E Series DC/DC converters have remote sense
that can be used to compensate for moderate amounts of
resistance in the distribution system and allow for voltage
regulation at the load or other selected point. The remote
sense lines will carry very little current and do not need a
large cross sectional area. However, the sense lines on the PCB
should be located close to a ground trace or ground plane.
In a discrete wiring situation, the use of twisted pair wires
or other technique to reduce noise susceptibility is highly
recommended. The remote sense circuitry will compensate
for up to 10% voltage drop between the sense voltage and the
voltage at the output pins. The output voltage and the remote
sense voltage offset must be less than the minimum over
voltage trip point. If the remote sense is not needed the –Sense
should be connected to –Out and +Sense should be connected
to +Out.
Remote Sense
Circuit confi guration for output voltage adjust
+Out
-Out
+Sense
Vadj
-Sense
Load
Radj
Radj
Decrease
Load
Increase
+Out
-Out
+Sense
Vadj
-Sense
Circuit confi guration
for RC function
+In
RC
-In
9
PKM 4000E PI Datasheet EN/LZT 146 051 R1A ©Ericsson Power Modules, February 2004
Operating Information
Over Temperature Protection (OTP)
The PKM 4000E Series DC/DC converters are protected from
thermal overload by an internal over temperature shutdown
circuit. When the PCB temperature adjacent to the PWM
control circuit exceeds 130 ºC the converter will shut down
immediately. The converter will restart when the temperature
drops below 120 ºC.
Note: Temperatures are typical values
Input And Output Impedance
The impedance of both the power source and the load will
interact with the impedance of the DC/DC converter. It is
most important to have a ratio between L and C as low as
possible, i.e. a low characteristic impedance, both at the
input and output, as the converters have a low energy storage
capability. The PKM 4000E Series DC/DC converters have
been designed to be completely stable without the need for
external capacitors on the input or the output circuits. The
performance in some applications can be enhanced by addition
of external capacitance as described under maximum capacitive
load. If the distribution of the input voltage source to the
converter contains signifi cant inductance, the addition of a
100µF capacitor across the input of the converter will help
insure stability. This capacitor is not required when powering
the DC/DC converter from a low impedance source with short,
low inductance, input power leads.
Parallel Operation
The PKM 4000E Series DC/DC converters can be paralleled
for redundancy if external o-ring diodes are used in series with
the outputs. It is not recommended to parallel the PKM 4000E
Series DC/DC converters for increased power without using
external current sharing circuits.
Maximum Capacitive Load
When powering loads with signifi cant dynamic current
requirements, the voltage regulation at the load can be
improved by addition of decoupling capacitance at the load.
The most affective technique is to locate low ESR ceramic
capacitors as close to the load as possible, using several
capacitors to lower the effective ESR. These ceramic capacitors
will handle short duration high-frequency components of
dynamic load changes. In addition, higher values of electrolytic
capacitors should be used to handle the mid-frequency
components. It is equally important to use good design practise
when confi guring the DC distribution system.
Low resistance and low inductance PCB (printed circuit board)
layouts and cabling should be used. Remember that when
using remote sensing, all resistance, inductance and capacitance
of the distribution system is within the feedback loop of the
converter. This can affect on the converters compensation and
the resulting stability and dynamic response performance. As
a “rule of thumb”, 100µF/A of output current can be used
without any additional analysis. For example with a 25A
converter, values of decoupling capacitance up to 2500 µF
can be used without regard to stability. With larger values of
capacitance, the load transient recovery time can exceed the
specifi ed value. As much of the capacitance as possible should
be outside the remote sensing loop and close to the load. The
absolute maximum value of output capacitance is 10 000 µF.
For values larger than this, please contact your local Ericsson
Power Modules representative.
Current Limit Protection
The PKM 4000E Series DC/DC converters include current
limiting circuitry that allows them to withstand continuous
overloads or short circuit conditions on the output. The output
voltage will decrease towards zero for output currents in excess
of max output current (Iomax).
The converter will resume normal operation after removal of the
overload. The load distribution system should be designed to
carry the maximum output short circuit current specified.
Over Voltage Protection (OVP)
The PKM 4000E Series DC/DC converters have output
overvoltage protection. In the event of an overvoltage condition,
the converter will shut down immediately. The converter will
make continuous attempts to start up (non-latching mode) and
resume normal operation automatically.
10 PKM 4000E PI Datasheet EN/LZT 146 051 R1A ©Ericsson Power Modules, February 2004
Thermal Consideration
General
The PKM 4000E Series DC/DC converters are designed
to operate in a variety of thermal environments, however
sufficient cooling should be provided to help ensure reliable
operation. Heat is removed by conduction, convection and
radiation to the surrounding environment. Increased airflow
enhances the heat transfer via convection. The available load
current vs. ambient air temperature and airflow at Vin=53 V
for each model is according to the information given under
the output section. The test is done in a wind tunnel with a
cross section of 305x305mm, the DC/DC converter vertically
mounted on a 8 layer PCB with a size of 254x254mm. Proper
cooling can be verified by measuring the temperature of
selected devices. Peak temperature can occur at position P1
and P2. The temperature at these positions should not exceed
the recommended max values.
Position Device Tcritical Recommended Max Value
P1 Transformer Tcore 110ºC
P2 Mosfet Tsurface 110ºC
Airflow
Input side
Output side
P2
P1
Calculation of ambient temperature
By using the thermal resistance the maximum allowed
ambient temperature can be calculated.
1. The powerloss is calculated by using the formula
((1/η) - 1) × output power = power losses.
η = effi ciency of converter. E.g 89% = 0.89
2. Find the value of the thermal resistance for each product in
the diagram by using the airfl ow speed at the output section
of the converter. Take the thermal resistance x powerloss to
get the temperature increase.
3. Max allowed calculated ambient temperature is: Max
T
PCB of DC/DC converter – temperature increase.
E.g PKM 4510E PI at 1m/s:
B. 6.1W × 5.5°C/W = 33.6°C
C.110°C - 33.6°C = max ambient temperature is 76.4°C
The real temperature will be dependent on several factors,
like PCB size and type, direction of airfl ow, air turbulence
etc. It is recommended to verify the temperature by testing.
A. (( ) - 1) × 49.5W = 6.1W
1
0.89
11
PKM 4000E PI Datasheet EN/LZT 146 051 R1A ©Ericsson Power Modules, February 2004
Quality
Reliability
The Mean Time Between Failure (MTBF) of the PKM 4000E
series DC/DC converter family is calculated to be greater than
(>) 7.0 million hours at full output power and an operating
temperature of +40°C using the Ericsson failure rate data
system (DependTool). The Ericsson failure rate data system
is based on field failure rates and is continuously updated.
The data corresponds to actual failure rates of components
used in Information Technology and Telecom equipment in
temperature controlled environments (TA= -5...+65°C). For
more information please refer to Design Note 002.
Quality Statement
The PKM 4000E series DC/DC converters are designed and
manufactured in an industrial environment where quality
systems and methods like ISO 9000, 6σ (sigma), and SPC
are intensively in use to boost the continuous improvements
strategy. Infant mortality or early failures in the products
are screened out and they are subjected to an ATE-based fi nal
test. Conservative design rules, design reviews and product
qualifi cations, plus the high competence of an engaged work
force, contribute to the high quality of our products.
Limitation of Liability
Ericsson Power Modules does not make any other warranties,
expressed or implied including any warranty of merchantability
or fitness for a particular purpose (including, but not limited to,
use in life support applications, where malfunctions of product
can cause injury to a person's health or life).
Delivery Package Information
Miscellaneous
The PKM 4000E Series DC/DC converters are intended for
through hole mounting on a PCB. When wave soldering is
used max temperature on the pins are specified to 215°C for 10
seconds. Maximum preheat rate of 4°C/s is suggested. When
hand soldering is used a thermocouple needs to be mounted on
the DC/DC converter pins to verify that pin temperatures does
not exceed 215°C for longer time than 10 seconds with the
used soldering tools. No-clean flux is recommended to avoid
entrapment of cleaning fluids in cavities inside of the DC/DC
power module. The residues may affect long time reliability and
isolation voltage.
Design for Environment (DfE)
The PKM 4000E Series DC/DC converters are designed to fulfi l
the wanted functionality with minimum environmental impact.
The low weight high effi ciency converters are assembled by
using lead free solder and a PCB with halogen free fl ame
retardant and Electroless Nickel Immersion Gold (ENIG)
plating. The converters are shipped in a recyclable package.
Soldering Information
PKM 4000E series standard delivery packages are 100 or 20
pcs boxes (One box contains 5 or 1 full tray(s)
and 1 empty hold down tray).
Tray Specifi cation
Material: Polystyrene (PS)
Max surface resistance: 10 MOhm/sq
Color: Black
Capacity: 20 pcs/tray
Loaded tray stacking pitch: 16.2 mm (0.64 In)
Weight: 133 g
Information given in this data sheet is believed to be accurate and reliable.
No re spon si bil i ty is assumed for the con se quenc es of its use nor for any infringement
of patents or other rights of third parties which may result from its use.
No license is grant ed by implication or otherwise under any patent or patent rights of
Ericsson Power Modules. These products are sold only ac cord ing to
Ericsson Power Modules’ general conditions of sale, unless oth er wise con fi rmed in
writing. Specifi cations subject to change without notice.
Datasheet
The latest and most complete infor-
mation can be found on our website
Option Suffi x Ordering No.
Positive Remote control logic P PKM 4510E PIP
Pin length 3.6 mm (0.14 in) LA PKM 4510E PILA
Note: As an example a positive logic, short pin
product would be PKM 4510E PIPLA
Product Program
EN/LZT 146 051R1A
© Ericsson Power Modules AB, February 2003
VI
VO/IO max PO max Ordering No.
Output 1
48/60 3.3 V/15 A 50W PKM 4510E PI
Product Options
The PKM-E series DC/DC converter may be ordered with different
options listed in the Product Options Table.
Ericsson Power Modules Americas
SE-141 75 Kungens Kurva, Sweden Ericsson Inc., Power Modules
Telephone: +46 8 568 69620 +1-972-583-5254, +1-972-583-6910
For local sales contacts, please refer to our website Asia/Pacifi c
www.ericsson.com/powermodules Ericsson Ltd.
or call: Int +46 8 568 69620, Fax: +46 8 568 69599 +852-2590-2453
For more information about the complete product program, please refer
to our website: www.ericsson.com/powermodules
